<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <button @click='add'>添加数据</button>
        <button @click='remove'>移除数据</button>
        <ul>
            <li v-for="(item,index) in arr">
                {{ index+1 }}黑马程序员校区:{{ item }}
            </li>
        </ul>
        <h2 v-for="item in vegetable" v-bind:title="item.name">
            {{item.name}}
        </h2>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el: '#app',
            data: {
                arr: ["北京", "上海", "广州", "深圳"],
                vegetable: [{
                    name: "西兰花炒蛋"
                }, {
                    name: "蛋炒西兰花"
                }]
            },
            methods: {
                add: function() {
                    this.vegetable.push({
                        name: "花菜炒蛋"
                    });
                },
                remove: function() {
                    this.vegetable.shift();
                }
            }
        })
    </script>
</body>

</html>